Hoisting mechanism



Dec. 31, 1929. M. P. HOLMES 1,742,163

DISTING "ECHANIS" V Original Filed July 24. 1922 3 Sheets-Sheet= 1 Dec. 31, 1929. p, HQLMES 1,742,168

' HOISTING MECHANISM Original Filed July 24. 1922 3 Sheets-Sheet 2 Dec. 31, 1929.

M. P. HOLMES HOISTING IECHANISI Ofiginal Filed July 24. 1922 s sheets-sheet :5

Patefiited Doc. 31, 1929 MORRIS r. Roms, or unanimous, saw nurrsnmn, assmnon 1-0 sunmvm In canmmr comrm, A oonrom'rron or nors'rnm' uncmm rsn Application m July at, 1e2a-sem1 in. mm. Renewed December 10, 1m.

My invention relates to hoisting mechanism and more particularly to hoisting mechanismof a type especially adapted for foundry use. An object of my invention is to. provide an 5 improved hoisting mechanism. Another ob ject of my invention is to pro'videan improved hoisting mechanism particularly ada ted to 'employmentinfoundries. Afurthero jectof my invention is to provide an improved hoisting mechanism in which the drum shall be self-locking, andin which by the use of a reversible type drive aheavy weight can be conveniently handled either in raising or lowering the same. Another object oi myin- 1'5 vention is to provide an improved hoisting mechanism in which, while the hoist itself is disposable at a considerable distance from the operator, hemay readily control its runhing. e In the accompanying drawings I have shown for the purpose of illustration one form whichmy invention may assume in practice. I In these drawings, Fig.1 is a view largely in side elevation but partially broken away to two different planes. l v

Fig.2 is an end elevation ofmy improved hoisting mechanism as illustrated herein. 3 Fig. 3 is a central section through my improved-hoisting mechanism, on a plane corresponding to the line 33 of Figs. 1 and 4. Fig. 4 is a vertical section on a plane corresponding to the section line 4-4 on Figs. 2 3 and Fig. 5-is a vertical section on'the line 5-5 of Fi 4; I In hoists which are to be employed in the handling of relatively large weights such as are commonly found in-foundries, it is important to provide both adequate power and 'ready control; 'It is also important that the drum shall automatically remain. locked in .the positionin which it is at the instant that the power is cut off, since it would obviously be most disastrous if, withthe sudden loss of power from any cause, the hoist should be re m unwind and lower such .weight as might be suspended therefrom.

the form of my invention which has been '3 and 4. Within this ca struction are reciprocable.

illustrated herein, I have provided a mechanism which is adapted to accomplish all the several desirable functions pointed out, In

its illustrativeform my hoisting mechanism is adapted-to be suspended froman point by a hook 1. My impro ed comprises a central portion 2and end closures driving motor generally designated 5 and reduction gearing generally designated 6, and

suitable hoisting mechanism is also enclosed in a which is enclosed 0.

also clutch mechanism generally, designated 7 and 8 which control the load by causing the v hoist to raise or lower the load depending upon which clutch mechanism is operated. Supported from depending han ers 9 and 10 at opposite sides of the hoist ousin is a transversely extending shaft 11, which shaft serves as -a journal upon which on suitable bearings 12 and 13 a drum 14 is rotatably supported. This drum is provided with spiral grooves extending in opposite directions from a point adjacent to the center thereof,

so that ropes wound upon the drum and se:

cured thereto at'the extremities thereof will be smoothly laid upon the surface as winding in takes place and run out smoothl and uniformly as the load is lowered. Midway of the length of the drum 14 there is secured thereto a worm wheel 16, which wheelie keyed thereto as indicated at 17 in such manner as to permit it to positively rotate the drum and to prevent rotation of the drum except 'on simultaneous rotation of the worm wheel. Extending transversely ofthe hoist casing and supported in frame webs 20 is a worm shaft 21 upon which a worm 22 formed.

This worm meshes-with the worm wheel 16 and drives the same or operates to lock the same against rotation, when the worm is not turnin The worm shaft. 21, which is journaled 1n bearings 23 in the frame web memhers 20, carries non-rotatively secured thereto at its opposite extremities members 25, which members comprise f annular cylinder bores 26 in which pistons 27 of annular con- 1 d1 The member:125 a so comprise inwar y ro acting an ar flanges 28 upon which th re lare fonried lon-' gitudinally extending keys 29 which-keys hold in non-rotatable relation with res ct thereto the alternate clutch discs of a motion clutch 31. Rotat'ably mounted upon the inner hub of each of the members 25 is a gear wheel 32 and these have flanges 33 surrounding the flanges 28 and rovided with inward- 1y directed ribs 34 w ich engage the other friction discs 35 of the friction clutch generall indicated 31. Formed in each end-of the, s aft 21 are ports 36 which orts are each provided with radially exten in branches 37 leading to p'assa es 38 in the e ements 25 and so to the annu ar cylinders 26. Bosses 38' formed upon the head members 3 and 4 project into the extreme end of the shaft 21 and packings, 39 surround these bosses to prevent leakage therefrom. Air is supplied to operate the clutches through passages 40 arranged in the end'closures 3 and 4. Above the worm shaft 21 in the upper part of the casing member 2 is a driving motor which is nerally designated 5. This motor is of a well known type and comprises a pair of rotors 46 and'47 journaled in the casing and enclosed in intersecting cylindrical rotor chambers 48 and 49 respectively. The rotors are provided upon their peripheries with spirally arranged intermeshing tooth blades which cooperate in the formation of expanding pockets to which fluid may be admitted for expansive action during the running of the motor. Exhaust takes place at the ends of the rotor chambers in a well known manner. The means for accomplishing this function, being well known, has not been shown. One of the rotors, herein the rotor 47,'is provided at one end of its supporting shaft with a driving pinion 51 whic meshes with one of the gears 32 loosely disposed on the shaft 21. The other rotor 46 is provided at the opposite end with a driving pinion 52 meshing with the other of the gears 32 loosely mounted upon the shaft 21. It will accordingly be evident that the gears 32 which are loosely mounted upon the shaft 21 are driven in opposite directions, as the rotors themselves rotate in opposite directions and so that the drum 14 is driven in either of opposite directions, depending, upon which one of these gears is connected through the clutch mechanisms described with the shaft 21.

For the purpose of controlling the operation of the motor 5 and also the supply of air to the clutch operating cylinders 26, I have provided a valve mechanism generally indicated at 55. This valve mechanism comprises a casin of conical shape 56 having a conical bore 5 within which there is rbtatably mounted a conical valve 58. The valve 58 as is customary in certain commercial forms of valves of thistype, is hollow internally, air being admitted to this hollow interior I through connection 58 A pair of spaced ports 59 through the valve wall may be shifted alternatively (by suitable' rotation f the valve) into registry with a passage 60 leading by further passage 61 to t e admission ort 62 of the motor 5. The motor is unidirectional in the matter of rotation and accordingly at any time when the valve occupies a position with either ,of the ports 59 in communication with the port 60 the motor will run, and depending on the air supply to the clutch mechanism will cause rotation of the drum in one direction or the other. Suitable passages 63 and 64 lead to the passages 40at the opposite ends of the worm shaft and conduct a supply of air to these chambers and then by way of the ports 36 and 38 to the annular c linders 26 to operate the clutches. For t e urpose of controlling the supply of air to t e passages 63 and 64 I have also provided ooves 65 and 66 in the valve, the first of which grooves is connected by a port 67 with the hollow interior of the valve. The groove 66 has the function of permitting the venting of whichever clutch cylinder is not in use, being adapted to connect the passage 63 or 64 with an exhaust port 66'. In order to permit the ready operation of the valve from a convenient location which is frequently remote from the hoist, I have arranged a lever 68 upon the valve operating shaft and provide extension pull cords 69 and 70 to shift the lever 68. As explained a cable is wound upon the opposite ends of the drum, the free ends of the cable being attached to the extremities of the drum. The central portion of the cable passes around pulleys 72 and 73 upon a hook carrier 74 and the loop then passes around a ulley 75 mounted on ahanger 76 depending rom the hoist casing.

From the foregoing description the mode of operation of this invention will be readily apparent. When it is desired to raise a weight the hook 77 will be engaged with the weight to be handled. The valve-mechanism 55 will then be operated by pulling the proper one of the extension cords 69 or 70 to shift the valve 58 to position to start the motor and connect the proper clutch, herein the clutch shown at the right hand side of Fig. 3. When this clutch has been connected the right hand gear 32 will be operatively connected with the worm shaft 21 which is driven whenever the motor is running and the worm 22 will then rotate counterclockwise in Fig. 4 causing the drum to rotate counterclockwise as viewed in Fig. 3 and so to haul in both ends of the cable at such a rate as to raise the hook and the weight suspended therefrom at a rate equal to one-half the peripheral speed of the suspended at any given height all that is necessary to do is to discontinue the running of the motor, and the worm 22 will lock the worm wheel and hold the weight and drum stationary. When it is desired to lower the weight it issimply necessary to pull the proper extensioncord 69 or 70 and cause the operdrum. If it is desired to maintain the weight ation of the other one of the friction clutches;

'- and thenthough the motor is running in the same direction the worm shaft will be positely rotated and the drum will be oppositely rotated. r 7

While Ihave this ap lication specifically described one orm whic my invention may assume in practice,it will be understood that this form of the same is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spirit or the scope of. the appended claims.

What I claim as new and desire to secure y Letters Patent is:

1. In a hoisting mechanism, a rotatable drum, a driving motor therefor having a pair of oppositely rotating power generating rotors, and means for selectively driving said drum b onerotor from one end of said motor or by t e other rotorl from the other end of the motor,'t hereby to drive said drum in oppo- 7 site directions.

' 2. a hoisting mechanism, a rotatable drum, adriving motor therefor having a pair of oppositeldvnrotating power generating rotors, drum "ving gearing driven by one of said rotorsfrom one end of saidmotor and by theother rotor from the opposite end of said motor,anda pair of clutches disposed at opposite ends of said motor and interposed 1n and gearing for controlling power flow from said rotors to said drum.

'3. In a hoisting mechanism, a rotatable drum, and driving means therefor includin V a rotatable worm, a clutch at either end 0 said worm, a gear at either end of said worm controlledby said clutches, and a motor including a pair of oppositely rotated .power generating .rotors each connected with one of said rs and driving the same contlnuo'usly uring the operation of said motor.

- 4. In a hoisting mechanism, a drum rotatable on a horizontal axis, a worm wheel thereon, a worm rotating on a horizontal axis (118- -posed in a plane transverse to said first mentioned axis, a driving motor for said drum including a pair of cooperating motor rotors each being-rotatable in only one direction, I

and each being provided with a driving pinion, the pinions being at opposite ends of the motor respectively, and driving connections between said worm and each of said pinions whereby one of said rotorsis adapted to drive the drum in one direction and the other in theopposite direction.

5. In a hoisting mechanism, a drum rotatable on a horizontal axis, a worm wheel thereon, a wormrotating on a horizontal axis disposed in a plane transverse to said first mentioned a and a driving motor for said worm inclu g a pair of intermeshing rotors .rotating'on axes parallel to said worm axis one rotor -one. end of sa d worm and the other being operatively connectible with operatively connectible with the other'end 0 said worm. a

6. In a hoisting mechanism, a drum rotat able on a horizontal axis, a worm wheel thereon, a worm rotating on a horizontal axis disposed in a plane transverse to said first mentioned axis, a driving motor forv said worm including a pair of lntermeshing rotors rotating on axes parallel to said worm axis one rotor being operatively connectible. with oneend of said worm and the other being operativelyconnectible with the other end of said worm and friction clutches for effecting such connections. i V

7. In a hoisting mechanism, a drum rotatable on a horizontal axis, a worm wheel thereon, a worm rotating on a horizontal axis disposed in a plane transverse to said first mentioned axis, a drlvlng motor for sa d worm including a pair of intenneshing rotors 7 rotating on axes parallel to said worm axis one rotor being operatively connectible with one end of said worm and the other being operatively connectible with the otherend of said'worm and friction clutches controlled.

by the motor operating medium for effecting such (connections.

8. In a hoisting drum, a frame having an ends of said drum, said ports carrying the mechanism, a winding rame having a s p. 1

port intermediate said ends engaging a bear:

ing surface on the drumperip drum actuatinggear carried by said intermediate su port comprising a casing surrounding sai gear. and. cooperating with thedrum periphery tially leak-proof chamber.

9. A hoisting mechanism comprising a motor, drum means, gear-means associated cry,

therewith and dis osed in acentral vertical zone, a substantia ly oil tight chamber cars-- and "a a said drum;

to form a substan ing positioned in the central zone and sur-' rounding and cooperating with the periphery I, j i of said drum and gear means, cooperating J 113 and means forming a substantially oil tight gear means disposed transversely of said zone,

iate said driving elements, 0 erative driving connections between said rum and one of said driving elements to drive the drum in one direction and operative drivin connections between said drum and the ot er of saiddriving elements to drive said drum in the opposite direction and a clutch interposed in each driving connection for controllingv driving of said drum whereby control of the drive of said drum in opposite directions by said motor is effected 11. In a hoisting mechanism, a unidirectional driving motor' having a driving element at each end of said motor, a winding drum disposed to one side and transversely ofthe motor and intermediate said driving elements, drum driving gearing operatively connected to one of said driving'elements to drive the drum in one direction and drum driving gearing operatively connected to the other of said driving elements to drive the ported transversely of the drum axis,ope rative driving connections between one of said driving elements and said power shaft for driving the latter in one direction, operative driving connections between the other of said driving elements and said power shaft for driving the latter in the opposite direction, each of saiddriving connections including a clutch whereby said power shaft may be selectively driven in either direction, and operative driving connections between said shaft and said drum.

13. In a hoisting mechanism, a rotatable drum and driving means therefor including a motor havin a pair of driving elements, one at each en thereof, said drum being arranged to one side and transversely of the motor, a Worm rotatably supported transversely of the drum axis, operative driving connections between one of said drivin elements and said worm for driving the atter in one direction, operative driving connections between the other of said drivin elements and said worm for driving the latter in the opposite direction, each of said driving connections including a drive. control means whereby said worm may be selectively driven in either direction, and a worm wheel driven by said worm surrounding and secured to said drum.-

14. In a hoist, a motor having a air of driving pinions, rope winding mec anism driven thereby having a plurality of rope engaging portions, a rotatable driver member for said rope winding mechanism disposed intermediate said rope engaging portions,"

and driving connections between said driver member and said driving pinions for "effecting rotation of said driver member in opposite directions including a pair of alternatively operable friction clutches, one of said clutches cooperating with one of said pinions to effect rotation of said driver member in one direction and the other *clutch cooperating with the other' inion to effect-rotation of said driver mem er in the opposite direction.

15 In a hoist, a motor'having a air of driving pinions, rope winding mee anism driven thereby having a plurality of rope engaging portions, a rotatable driver member for said rope winding mechanism disposed intermediate said rope engaging portions, and driving connections between said driver member and said drivingpinions for effecting rotation of said driver member in opposite directions including a pair of alternatively operable friction clutches, one of said clutches cooperating with one of said pinions to effect rotation of said driver member in onedirection and the other clutch cooperating with the other pinion to effect rotation of said driver member in the opposite direction, and a single manually operable member for controlling said clutches.

16. In a hoisting mechanism,'a rotatable drum and driving means therefor including a motor having a driving element at each end thereof, the axis of the motor being dis- 'posed transversely withrespect to the drum,

a power shaft rotatably supported parallel to said motor'axis, operative driving connections between each of said driving elements and the respective adjacent portion of said power shaft, eachof said driving connections including. a clutch, and an operative driving connection between said shaft and said drum,

the three connections being so arranged along said shaft thatlthe last mentioned connection is intermediate the other two.

17. In a hoisting mechanism, a rotatable drum and driving means therefor including a motor having a driving element at each end thereof the axis of the motor being disposed transversely with respect to the drum, a power shaft rotatably supported parallel to said motor axis, operative driving connectionsbetween each of said driving elements and the respective adjacent portion of said power shaft, each-of said driving connections including a clutch, and an operative. driving connection between said shaft and said drum including a gear surrounding and secured to'said drum, the three connections-being so arranged along said shaft that the last mentioned connection is intermediate the other two. J

18. In'a hoist, a fluid pressure motor, rope winding mechanism driven thereby having a plurality of rope engaging portions, a plurality of sets of driving'gearing for driving said rope winding mechanism, said sets of driving gearing being driven bysaid fluid pressure motor, a fluid pressure operated drive control device operatively'connected to each of said sets of gearing, and a single valve for controlling flow of fluid said masses motor and to said plurality of fluid operated drive control devices and movable to determine which of said fluid operated drive coning. reiations with said winding mechanism in accordance with the positions i of said single valve.

20. lln a hoisting mechanism, drum means, a driving motor therefor including cooperating motor rotors, and driving connections between said motor and said drum means including a pair of pinion's one carried by each of said rotors, and a common power transmission element adapted to be connected alterna tively toone or the other o'lisaid pinions, said pinions being disposed at the opposite ends of said motor respectively.

21. ln a hoisting mechanism a drum, a

driving motor therefor including cooperating motor'rotors rotatable in opposite directions,

' and driving connections bet-ween said motor and said drum including a pair of driving pinions, said pinions being disposed at the opposite ends of said motor and each rotor driving a pinion, a power transmission element disposed parallel to said motor rotors, and a pair of alternatively engaging clutches, each clutch cooperating with one of said pinions to connect the same't'o said power transmission element.

22. In a hoisting mechanism, a drum, a driving motor therefor including cooperating motor rotors rotatable inopposite directions,

and driving connections between said motor and said drum including a pair oi'driving 'pinions, said pinions being disposed at the opposite ends of sald motorand each rotor drivin a pinion, a power transmission element disposed parallel to said motor rotors, a

pair of alternatively engaging clutches, each v clutch cooperating with one of said pinions to connect the same to sald power transmiswith one of said ears and. driving the same continuously during the operation of said motor.

24. In a hoisting mechanism, a drum rotatable on a horizontal axis, a toothed driving element secured thereto, a driving element cooperating therewith, a driving motor for actuating said second mentioned driving element including a plurality of cooperating motor rotors each being rotatable in only one direction and each belng provided with a driving pinion, the pinions being at opposite ends of the motor respectively, and driving connec= tions between said second mentioned driving elment and each of said pinions whereby one of said rotors is adapted to drive the drum in one direction and the other in the opposite direction.

25. In a hoisting mechanism, a drum rotate able on a horizontal ZLXIS, a toothed driving element secured thereto, a driving element cooperating therewith, said second mentioned driving element rotating on a horizontal axis disposed in a plane transverse to said first mentioned axis, and a driving motor for said second mentioned driving element including a pair of intermeshing rotors rotating on axes parallel to theaXis of said element, one rotor being operatively c'onnectible with one end of said element and the other being operatively con nectible with the other end of said element.

26. In a hoisting mechanism, a drum rotatableon a horizontal axis, a toothed driving element secured thereto, a two ended driving clement cooperating therewith, a driving motor for said two ended driving element including a pair of intermeshing rotors one rotor being operatively connectible with one of said ends and the other being operatively connectible with the other of said ends, and friction clutches for efi'ecting such connections.

In testimony whereof I afix m signature. MORRIS P. =H O sion element, and common means for controlling the actuation of. said clutches and controllin power flow to said motor.

23. drum, and driving means therefor including a rotatable driving member, a clutch at either end of said driving member, a gear at either end of said driving member controlled by said clutches, and amotor including a pair of oppositely rotated motor rotors each connected n a hoisting mechanism, a rotatable ldll 

